diff --git a/chatchart/chatchart.py b/chatchart/chatchart.py
index 2b4405c..d337892 100644
--- a/chatchart/chatchart.py
+++ b/chatchart/chatchart.py
@@ -8,7 +8,9 @@ import heapq
 import os
 from io import BytesIO
 import matplotlib
+matplotlib.use('agg')
 import matplotlib.pyplot as plt
+plt.switch_backend('agg')
 from discord.ext import commands